Minimum Total Loss Trajectory Based on Novel Mathematical Model of PMSM with Iron Loss

A new minimum total loss trajectory is derived and analyzed based on the novel mathematical model of permanent-magnet synchronous motor proposed by Shinnaka in 2024, which required considering the iron loss. The analysis shows that the new trajectory has the following characteristics: (a) The new trajectory exhibits zero-point passing characteristics at zero torque regardless of speed. (b) The new trajectory is identical to the conventional trajectory in the high torque region.